Hi Shawn,

I tested 2015 version on Sierra on another Mac in another place. I also tested 2016 and 2017 versions on that Mac.
The result was ....
I have the same issue as you (many copies of DWG files which are created on save in AutoCAD) on this Mac in the another place.

So it looks like the issue is related to the Internet connection. In my case I think that the Internet connection on that new place is not so stable (fast ?) as in the place where the issue is not reproducible.

Maxim